May in Zittau is the rainiest month of the year. In May, the weather in Zittau is typically warm. Average daily high temperature in May is about 16 degrees above zero. On average, Zittau has 20 rainy, 7 sunny, 3 partly cloudy, and 1 cloudy day in May. The rains are usually moderate. May as well as January, February, March, and April is considered the most uncomfortable time to visit Zittau.